E-Flora BC: Electronic Atlas of the Flora of British Columbia

Senecio eremophilus Richardson
Desert Ragwort (dryland ragwort; Elmer's Butterweed)
Asteraceae (Aster family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #5679)

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Distribution of Senecio eremophilus
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Senecio eremophilus var. eremophilus

Species Information

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Perennial herb from a short, poorly developed taproot; stems erect, mostly solitary, branched above, 0.3-1.2 m tall, glabrous.
Basal leaves soon deciduous; stem leaves lanceolate to oblanceolate, stalked, 4-15 cm long including the stalk, 1-4 cm wide, coarsely deeply-toothed to deeply pinnately cut, glabrous or nearly so; stem leaves reduced and becoming unstalked upwards.
Heads with ray and disk flowers, several to numerous in a flat-topped to rounded inflorescence; involucres 7-9 mm tall; involucral bracts lanceolate with long-pointed tips, inconspicuously black-tipped; bracteoles few, inconspicuously black-tipped; ray flowers yellow, mostly 6-10 mm long; disk flowers yellow.
Achenes oblong, ribbed, glabrous; pappus of white hairlike bristles.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry forests in the steppe and montane zones; frequent in C and NE BC, restricted to the Fraser and Peace River drainages; E to ON and S to NE, AZ and NM.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Senecio eremophilus

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 1160 1302 1444
Slope Gradient (%) 5 10 15
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
174 174 174
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 4 5
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: MS(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References